OSL shader issue, could not find include file: node_texture.h"
The change happened before 2.72 was released and I still haven't got around to looking into whether the change came from blender or OSL 1.5. It is a matter of search paths and I think they need to be changed in code.

The file you are looking for is included with blender, it is installed in 2.72/scripts/addons/cycles/shader/ You can also find it in blender's source tree at intern/cycles/kernel/shaders/node_texture.h

The solution for now is to place a copy of it in the same folder as the osl script that wants to include it.